[Amps] CHASSIS

[Bob Nielsen]

On Mar 16, 2006, at 6:55 AM, R at contesting.com;Measures wrote:

>
> On Mar 16, 2006, at 6:22 AM, k7fm wrote:
>
>> "Amen, Arne, and plywood is stiffer pound for pound than metal.   
>> During
>
> Birch is what the Hughes Hercules/Spruce Goose flying ship/boat was
> made of.
>>
>> What wood does not do is shield rf.
>

When I worked at Hughes, I ran some tests on one of the birch plywood  
panels left over from the HK-1 to evaluate the r.f. properties.  I  
don't recall the details (this was probably 35 years ago--someone  
actually had an idea for another application) but, as would be  
expected, the panel was somewhat lossy at microwave frequencies  
(although it was definitely not a shield).

Bob Nielsen, N7XY